Exam 28: Global Climate Change

Most plants respond to elevated atmospheric carbon dioxide by increasing their photosynthetic rate.

General circulation models predict that global warming will be greatest during the winter months and in northern latitudes.

Plants exposed to higher atmospheric carbon dioxide often partially close the ________ in their leaves to reduce water loss.

Which of the following is NOT true?

According to general circulation models, warming is expected to be most significant during the ________ season and in northern latitudes.

Aerosols reduce the amount of radiation reaching Earth's surface and thus have a cooling effect.

Most species of agricultural crops will benefit from a rise in carbon dioxide concentrations by increasing crop yields.

As a consequence of global climate change, human populations in low-lying coastal areas will become threatened by rising sea levels.

When carbon dioxide dissolves in ocean water, much of it is transformed into ________.

In response to an increase in atmospheric carbon dioxide, plants generally

Samples of pollen taken from ________ cores in lake beds have allowed scientists to reconstruct the vegetation of many regions of the past 20 000 years.

Most plants respond to elevated atmospheric carbon dioxide by partially closing their stomata, reducing water loss due to transpiration.

Describe the potential impacts of global climate change on coastal environments.

Within the past century, the major source of carbon emissions into the atmospheric has been

Discuss the anticipated changes in the distribution of plants, animals, and ecosystems in response to global climate change.

As a consequence of global climate change, plant and animal distributions will generally shift toward higher latitudes and elevations.